Daily Sunspot Evaluation
Observation Sheet Thursday, 7 August 1969
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 9
- Number of spots (f)
- 89
- Relative number (R)
- 179
- Observer
- FY
- Reading
- all checks consistent
- File
- 19690807.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 4 | 20 | 28E | 16 | |||
| 2 | J – 5 | 14 | 28E | 16 | |||
| 3 | J – 4 | 16 | 47E | 357 | |||
| 4 | C – 16 | -22 | 07W | 51 | |||
| 5 | C – 3 | -15 | 10W | 53 | |||
| 6 | E – 30 | -12 | 23W | 67 | |||
| 7 | ? – 8 | -9 | 85W | 129 | |||
| 8 | C – 9 | 9 | 11W | 55 | |||
| 9 | C – 10 | 13 | 75W | 119 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.